Video Measuring System  is also known as the two dimension, which overcomes the shortcomings of traditional projector, is a light, machine, electricity, computer image technology in one of the new type of high precision, high measuring instrument. With high magnification optical magnification imaging object measured by optical microscope, CCD camera system will be enlarged images of objects into the computer, can effectively detect various complicated workpiece contour and surface shape and size, angle and position, especially the micro detection and quality control of precision parts. The measurement data directly into AUTOCAD, a complete engineering drawings, graphics can generate DXF document, also can be input to the WORD, EXCEL, statistical analysis, can draw a simple Xbar-S control chart, the Ca, and other parameters.Classification of Video Measuring System : can be divided into manual Video Measuring System , automatic Video Measuring System  and flashover test Video Measuring System .